There are two settings
in the resource.settings file that
are related to memory usage.
# VM limit (in KBytes). Default is unlimited
export TKMPI_ULIMIT="-v 50000000"
# Memory allocation limit (in MBytes). Excludes mmapped files.
# Default is unlimited.
export TKMPI_MEMSIZE=2097152
Some choices for using
these settings are as follows:
TKMPI_ULIMIT
sets a limit for the
entire process. For SAS LASR Analytic Server,
this includes the memory that is required to run the server itself,
all tables, and memory that is used for processing actions. Specifically,
the memory that is used when loading SASDHAT tables to memory is included
in the limit.
TKMPI_MEMSIZE
sets a limit to the
size of in-memory tables and memory that is used for processing actions.
SASHDAT tables that are loaded to memory are not included in the limit.
If you use these options
for managing memory, be aware that the server uses memory for temporary
operations like identifying distinct counts of values or grouping
observations. If your goal is to limit the amount of memory that is
used for in-memory tables, then include some overhead.
Also keep in mind that
the default behavior for a server is to reject requests add tables
or append data after 75% of memory is used on the machine. This percentage
is configurable with the TABLEMEM= option to the SERVERPARMS statement
for the IMSTAT and VASMP procedures. As with the TKMPI_MEMSIZE setting,
the TABLEMEM= percentage does not apply to SASHDAT tables.